| The technology of navigation and localization has been playing an important role in the exploration and research of oceans. Nowadays, the underwater acoustic positioning system is the mainstream of underwater navigation and localization. With the further development of the underwater research and exploitation, more and more research methods should be utilized, such as underwater vehicles, the video system as well as other kinds of exploration equipments, therefore the high accurate navigation and localization is the precondition to realize the underwater high accuracy, high efficiency scientific research and production activities.The content of this paper is the positioning system using in the project of "A ROV for Dam Security Inspection". When the ROV carries out the underwater inspecting task, it needs precise positioning system to navigate and locate the position. The underwater acoustic positioning system realizes the localization function of the ROV through beacon and receiver.A review about the underwater acoustic positioning technology was made first, then the method of underwater acoustic positioning was studied, and several kinds of positioning modes and calculation methods were analyzed. At last, the positioning scheme for the ROV was determined.In this paper, the design and fulfillment of the underwater beacon was also provided, and the source signal needed by the signal source was produced using single chip computer AT89S51 according to the design requirements.The most important part of the paper is the hardware design and realization of the receiver of the underwater acoustic positioning system, including design and debugging of the hardware electric circuit. The receiver is composed of analog signal modulation, data acquisition and processing, data uploading and power supply. The analog part includes the operation amplifier design, the band pass filter design and the automatic gain design, while the digital part includes... |
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